Action for pipe organs



Dec. 20, c, GRANT ACTION FOR PIPE ORGANS Filed June 3, 1951 Patented Dec. 20, 1932 UNITED STATES cAsrER nrmnnn GRANT, or PORTSMOUTH, VIRGINIA ACTION FOR PIPE ORGANS Application filed 1m 3, 193i. Serial No. 541,89

' 7" Another object is to utilize a valve action which is free of springs, is formed of the minimum number of parts, and produces an extensive but abrupt movement of the actuated part. v

i A still further object is to provide an efficient action which operates on a low voltage so that a low voltage can be used throughout the organ structure and danger of arcing at the various contacts in the organ is eliminated with a consequent reduction in fire hazards.

With the foregoing and other objects in view which will appear as the description'proceeds, the invention resides in the combinationand arrangement of parts and in the details of construction hereinafter described and claimed, it being understood that changes in the precise embodiment of the invention herein disclosed may be made within the scope of what is claimed without departing from the spirit of the invention. I

In the accompanying drawing the pre ferred form of the invention has been shown.

In'said drawing: 7

Figure 1 is a'section through a portion of a pipeorgan equipped with the present invention. 1 v

Figure 2 is a sectionon'line 22, Figure 1. Figure 3 is a view of a modified structure.

Figure 4 is a section on line 4-4, Figure 1.

Referring to the figures by characters of reference, 1 designates a wind chest for hold- 7 ing the series of valve actions whereby the 4 -flow of air to the pipes is controlled. These pipes, one of which has been shown at 2, are

' mounted at'their lower ends on a rest 3 provided with ports 4 for conducting air 'to the respective pipes. Each of-these pipes can be held in a sleeve 5 carried by a standard 6 or a is limited in its movement by abutton 17 carremoved at the" free end due to the formation can be connected to and operated by a hanger 8. The

upper end of the hanger is pivotally connected by pointed bearing studs 9 to an arm 10 fixedlymounted in the wind chest 1 above port 4. An integral core 11 extends downwardly from arm 1O and carries the coil 12 of an electromagnet. y

. The lower free end of core 11 is beveled as shown at 13 and extending into close proximity thereto is an arcuate armature 14 formed integral with hanger 8 and arranged inan arc concentric with the pivot 9 so as to travel across the end of the core and remain very slightly but uniformly spaced therefrom. The tree-end of armature 14 has a V-shaped recess 15 providing spaced terminalpoints 16 which normally lie close to the armature as shown in Figure 2 so as to be well within themagnetic field. The hanger 8 is a part of the armature and ried by a pin 18. Normally however, the weight of the armature and the valve will maintain the valve in closed position across port4 where it will be held tightly by the wind pressure inthe chest 1;

When the coil is energized the armature 14 will be pulled in the direction of its length and as some of the metal of the armature is of (recess 15, the tendency of the magnet will beto pull the armature inthe direction of its length rather than transversely thereof, thispulling'action increasing as the apex of the recessapproaches the center of-the core 11. As a result of this action it has been found that with a low voltage the magnet will operate t'o'open valve 7-against what have beenconsidered high Wind pressures. The advantage residingin the use of a lowvoltage isthe reduction of danger ofarcing. at the various contacts in anorga'n structure and consequent reduction of fire hazard. It has been, impossible, as far as I'am aware, until now to use as little as ten volts'in a valve.

action. 1 9

lVhile this electro-magnet construction is will exert the maximum pull longitudinally particularly useful as a valve operating of the armature and unseat the valve.

means, it is to be understood that it can also be used as a relay and for other purposes in the mechanism or the organ. For example,

and as shown in Figure 3, a contact 17 can be insulated from but carried by the armature 18 and pulled against two or more yieldable terminals 19 for closing a circuit therethrough.

Obviously other changes can be made in the construction of the device. The number of coils can be increased and they can be arranged in any suitable manner for further increasing the power of the magnet while still retaining the important features hereinbefore enumerated, namely, the arcuate armature and the recess in the end thereof.

It will be noted that the armature is mounted on pointed pivot studs 9. This gives a freely movable hanger type of armature which is very desirable because of its firm bearing and ease of movement.

Obviously different types of valves can be used to meet the different demands and it is not intended that the invention be limited to the form of valve shown.

What is claimed is:

1. In an action for pipe organs an electromagnet including a core, an armature electrically connected to one end portion of the core and mounted to swing relative thereto, said armature being concentric with its point of connection and movable close to and across the other end of the core, there being a. V-shaped recess extending into the free end of the armature the sides of which are substantially tangent to the core and converge away from the core to the apex of the recess, said recess providing spaced ends normally close to the sides of the core adapted gradually to enter the field of the armature when energized thereby to exert a pull of maximum strength longitudinally of the armature.

2. In a pipe organ construction the combination with a-wind chest having an outlet port, of means for controlling the flow of air through the port from the chest, including an arm, a core extending therefrom, a hanger pivotally connected to the arm and extended downwardly therefrom, an armature integral with the hanger and supported close to and movable across one end of the core, said armature and end of the core being substantially concentric with the axis of movement of the hanger, a magnet coil on the core, and a valve on the hanger normally closing the port by gravity, said armature having a V-shaped recess extending into the free end thereof, the edges of said recess being substantially tangent to the core and converging to the apex of the recess at one end, the other ends of said edges constituting s aced terminals supported in the field o the core whereby, when the magnet is energized it In testimony that I claim the foregoing as my own, I have hereto aflixed CASPER ELDRE ature. ANT. 

